OpenVMS Cluster Systems - OpenVMS Systems - HP

Table 5–2 Alias Collisions and Outcomes
Collision Type Outcome
Creating a local table with same
name and access mode as an
existing clusterwide table
Creating a clusterwide table with
same name and access mode as an
existing local table
Creating a clusterwide table with
same name and access mode as an
existing clusterwide table
Preparing a Shared Environment
5.4 Clusterwide Logical Names
New local table is not created. The condition value
SS$_NORMAL is returned, which means that the
service completed successfully but the logical name
table already exists. The existing clusterwide table
and its names on all nodes remain in effect.
New clusterwide table is created. The condition
value SS$_LNMCREATED is returned, which means
that the logical name table was created. The local
table and its names are deleted. If the clusterwide
table was created with the DCL command DEFINE,
a message is displayed:
DCL-I-TABSUPER, previous table table_name
has been superseded
If the clusterwide table was created with the
$CRELNT system service, $CRELNT returns the
condition value: SS$_SUPERSEDE.
New clusterwide table is not created. The condition
value SS$_NORMAL is returned, which means that
the service completed successfully but the logical
name table already exists. The existing table and
all its names remain in effect, regardless of the
setting of the $CRELNT system service’s CREATE-IF
attribute. This prevents surprise implicit deletions of
existing table names from other nodes.
5.4.5 Creating Clusterwide Logical Names
To create a clusterwide logical name, you must have write (W) access to the
table in which the logical name is to be entered, or SYSNAM privilege if you
are creating clusterwide logical names only in LNM$SYSCLUSTER. Unless
you specify an access mode (user, supervisor, and so on), the access mode of the
logical name you create defaults to the access mode from which the name was
created. If you created the name with a DCL command, the access mode defaults
to supervisor mode. If you created the name with a program, the access mode
typically defaults to user mode.
When you create a clusterwide logical name, you must include the name of a
clusterwide logical name table in the definition of the logical name. You can
create clusterwide logical names by using DCL commands or with the $CRELNM
system service.
The following example shows how to create a clusterwide logical name in the
default clusterwide logical name table, LNM$CLUSTER_TABLE, using the
DEFINE command:
$ DEFINE/TABLE=LNM$CLUSTER_TABLE logical-name equivalence-string
To create clusterwide logical names that will reside in a clusterwide logical
name table you created, you define the new clusterwide logical name with the
DEFINE command, specifying your new clusterwide table’s name with the
/TABLE qualifier, as shown in the following example:
Preparing a Shared Environment 5–9